Heat quantity
Constant flow
If “Constant flow” is activated as the type of heat quantity metering, the approximate heat from the manually entered values for anti-
freeze, its concentration and the flow from the system and the measured sensor values from the collector and storage are calculated.
Additional information about antifreeze, its concentration and the flow of the system is required. Additionally through the setting offset ∆T,
a correction factor can be set for the heat quantity collection. Since the collector temperature and the storage temperature can be used
for the heat quantity metering, depending on the system, there may be deviations from the displayed collected temperature to the actual
previous temperature or the displayed storage temperature to the actual return temperature. Through the setting Offset ∆T, this deviation
can be corrected.
Example: displayed collector temperature 40°C, read previous temperature 39°C, displayed storage temperature 30°C, read return tem-
perature 31° means a setting of -20% (displayed ∆T 10K, actual ∆T 8K => -20% correction value)
The heat quantity data in the “Constant flow” mode only consists of calculated values for the functional inspection of the sys-
tem.
Flow temperature sensor (X)
In this menu, it is set which sensor is used to measure the return flow temperature.
Return flow sensor
In this menu, you can set which sensor is used to measure the return flow temperature.
Glycol type
In this menu, the antifreeze used is set. If none is used, please set glycol proportion to 0.
Glycol percentage
The percentage of antifreeze in the medium.
Flow rate supply flow (X)
Nominal system flow.
The flow of the system in liters per minute, which is used as calculation basis for heat metering.
Offset ∆T
Correction factor for the temperature difference for heat metering
Since the collector temperature and the storage temperature can be used for the heat quantity metering, depending on the system, there
may be deviations from the displayed collected temperature to the actual previous temperature or the displayed storage temperature to
the actual return temperature. This deviation can be corrected with the adjustment value Offset ΔT
Example: displayed collector temperature 40°C, read previous temperature 39°C, displayed storage temperature 30°C, read return tem-
perature 31° means a setting of -20% (displayed ∆T 10K, actual ∆T 8K => -20% correction value)
VFS (X)
The type used of direct sensor is set in this menu.
VFS - Position
This menu is used to set whether the direct sensor was mounted in supply or return flow.
To prevent damage to the Vortex Flow sensor it is highly recommended to place it in the return flow. If contrary to this recom-
mendation it is used in the supply line, the maximum temperature has to be considered. (0 ° C to 100 ° C continuous oper-
ation and short term -25 ° C to 120 ° C)
Reference sensor
The sensor to be used for heat metering is set here.
Commissioning
Starting commissioning help guides you in the correct order through the basic settings necessary for commissioning, and provides brief
descriptions of each parameter in the display. Pressing the ‚esc‘ key takes you back to the previous value so you can look at the selec-
ted setting again or adjust it if desired. Pressing ‚esc‘ more than once takes you back to the selection mode, thus cancelling the com-
missioning help (See " Commissioning help " on page 28).
May only be started by a specialist during commissioning! Observe the explanations for the individual parameters in these
instructions, and check whether further settings are necessary for your application.
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